ZipCheckup VS PostalDataPI

Compare ZipCheckup VS PostalDataPI and see what are their differences

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ZipCheckup

Check water quality, product recalls, energy rebates, and safety alerts for any U.S. ZIP code. Free reports powered by EPA and government data.

PostalDataPI

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Image date //
2026-04-04

ZipCheckup analyzes 50+ federal data sources (EPA, FEMA, CDC, USGS, Census) to generate free home safety reports for all 42,679 U.S. ZIP codes. Covers water quality, lead risk, PFAS contamination, flood risk, radon, wildfire, earthquake, mold, and 9 more safety categories. 283,000+ pages, updated daily.

Landing page //
2026-04-08

PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions.

What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates, timezone, three levels of administrative hierarchy, elevation, and more. Sub-5ms cached responses.

Works everywhere: US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, Canadian FSAs, and 230+ more. Format normalization handles case, spacing, and hyphen variations automatically.

Get started in 60 seconds: 1,000 free queries on signup, no credit card required. SDKs for Python and Node.js. MCP server for AI agents (Claude, Cursor, etc.).

Built for developers: REST API, consistent JSON responses across all countries, OpenAPI spec, llms.txt for AI agent discovery.

ZipCheckup

Website: zipcheckup.com
Pricing URL: -
$ Details
Release Date: 2026 March
Startup details
Country: United States
Founder(s): Artem Akulov
Employees: 1 - 9

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PostalDataPI

Website: postaldatapi.com
Pricing URL: Official PostalDataPI Pricing
$ Details: -
Release Date: 2026 March
Startup details
Country: United States
State: ID
City: Eagle
Founder(s): Thom Ives
Employees: 1 - 9

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ZipCheckup features and specs

No features have been listed yet.

PostalDataPI features and specs

Specialized Postal Data
PostalDataPI focuses specifically on postal and address-related data, providing dedicated endpoints for ZIP code lookups, address validation, and geographic postal information, making it a niche solution for mailing and logistics needs.
Simple API Integration
The API appears to offer straightforward RESTful endpoints that are relatively easy to integrate into existing applications, requiring minimal setup and configuration for developers.
Useful for Address Validation
The service can help businesses validate and standardize mailing addresses, reducing undeliverable mail, saving postage costs, and improving data quality in customer databases.
Geographic Data Enrichment
PostalDataPI can enrich address data with additional geographic information such as coordinates, county, and timezone details associated with postal codes, which is valuable for analytics and location-based services.
Lightweight and Focused
As a specialized micro-API, it avoids the bloat of larger platforms, offering a focused toolset that does one thing well — handling postal and ZIP code data without unnecessary complexity.

Analysis of ZipCheckup

Overall verdict

ZipCheckup appears to be a niche, lightweight tool for looking up ZIP code data and validating addresses, suitable for quick reference or small-scale verification needs, though it's not a widely recognized or heavily reviewed platform.

Why this product is good

Provides quick ZIP code lookups and related location data
Simple, easy-to-use interface for basic address verification tasks
Free access for casual use, which is helpful for occasional lookups
Useful for cross-referencing ZIP codes with cities and states

Recommended for

Individuals needing quick ZIP code verification
Small business owners checking customer address details occasionally
Online sellers verifying shipping information
Users who need a simple, no-frills ZIP lookup tool without heavy integrations

Analysis of PostalDataPI

Overall verdict

I don't have verified, up-to-date information specifically about PostalDataPI (postaldatapi.com), including details on its accuracy, pricing, uptime, or customer reviews. I can't confirm whether it's a good product without more direct data or firsthand testing, so I'd recommend evaluating it yourself using the criteria below before committing.

Why this product is good

Unable to verify specific claims about data accuracy, coverage, or update frequency for this service
No confirmed information on pricing tiers, rate limits, or API reliability (SLA/uptime)
No verified user reviews, testimonials, or third-party comparisons available
Company background, support quality, and documentation quality are unconfirmed
If considering this service, check for: free trial/sandbox access, transparent pricing, data source citations, response time benchmarks, and independent reviews on sites like G2 or Trustpilot

Recommended for

Not able to make a specific recommendation without verified data
Best approach: developers needing postal/address validation APIs should compare this against established alternatives (e.g., SmartyStreets, Lob, Google Maps Geocoding API, USPS Web Tools) based on documented accuracy and pricing
Suitable evaluation candidates: teams willing to test the API directly with sample data before integrating into production systems

ZipCheckup videos

No ZipCheckup videos yet. You could help us improve this page by suggesting one.

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PostalDataPI videos

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PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries

Category Popularity

0-100% (relative to ZipCheckup and PostalDataPI)

ZipCheckup

PostalDataPI

Analytics

100 100%

Analytics

0% 0

Geolocation API

0 0%

Geolocation API

100% 100

Safety

100 100%

Safety

0% 0

Developer Tools

0 0%

Developer Tools

100% 100

User comments

Share your experience with using ZipCheckup and PostalDataPI. For example, how are they different and which one is better?

Social recommendations and mentions

Based on our record, ZipCheckup seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

ZipCheckup mentions (1)

I Built a 278,000-Page Website From Federal Data for $5/Month
I spent the last few months stitching it all together into one site. ZipCheckup. Type in a ZIP code, get a full home safety profile. 278,000 pages. 50+ data sources. Running on $5/month. - Source: dev.to / 3 months ago

PostalDataPI mentions (0)

We have not tracked any mentions of PostalDataPI yet. Tracking of PostalDataPI recommendations started around Apr 2026.

What are some alternatives?

When comparing ZipCheckup and PostalDataPI, you can also consider the following products

usZIPCodes.org - Use our free ZIP Code Analysis Tool to find city, state, county, population, and timezone details for any U.S. ZIP code. Fast, accurate, and privacy-safe lookup.

Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.

Zipcodestack - Free Zip Code API - Free Postal Code Validation | Zipcodestack

Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).

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